Oscillators – Molecular or particle resonant type
Patent
1977-05-06
1979-10-02
Davie, James W.
Oscillators
Molecular or particle resonant type
357 17, 357 18, H01S 319
Patent
active
041699971
ABSTRACT:
Described is a stripe geometry double heterostructure (DH) junction laser in which lateral current confinement is achieved by pairs of laterally spaced, reverse-biased p-n junctions. A mesa is formed on an n-GaAs substrate, for example, and a layer of p-AlGaAs is then grown by LPE so that nucleation does not occur on the top of the mesa. Laterally spaced zones of p-AlGaAs are thus formed on either side of the mesa. An n-p-p or n-n-p DH is then grown so that the interface between the p-AlGaAs layers and the first n-layer of the DH forms a pair of laterally spaced p-n junctions separated by the mesa. When the light-emitting p-n junction in the DH active region is forward biased, the pair of spaced junctions are reverse biased so that pumping current is constrained to flow through the active region in a narrow channel to the mesa. Further lateral current confinement is achieved by forming on the upper DH surface a second pair of reverse biased p-n junctions separated by a window in alignment with the mesa.
REFERENCES:
patent: 3984262 (1976-10-01), Burnham et al.
Tsukada, "GaAs-Ga.sub.1-x Al.sub.x As Buried-Heterostructure Injection Lasers", J. of Applied Physics, vol. 45, No. 11, Nov. 1974, pp. 4899-4906.
Itoh et al., "New Heteroisolation Stripe-Geometry Visible-Light-Emitting Lasers", IEEJ. of Quantum Electronics, vol. QE-11, No. 7, Jul. 1975, pp. 421-426.
Burnham et al, "Distributed Feedback Buried Heterostructure Diode Laser", Applied Physics Letters, vol. 29, No. 5, 1 Sep. 1976, pp. 287-289.
Burnham et al, "Striped-Substrate Double-Heterostructure Lasers", IEEJ. of Quantum Electronics, vol. QE-11, Jul. 1975, pp. 418-420.
Teramoto, "New Structures Boost Semiconductor Laser Performance--at Last a Practical Room-Temp Visible Laser", JEE, Mar. 75, pp. 32-37.
Logan Ralph A.
Tsang Won-Tien
Bell Telephone Laboratories Incorporated
Davie James W.
Urbano Michael J.
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